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V - i graph for a metal wire at a temperature is as shown in figure

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$T_{1} < T_{2}$

$T_{1} = T_{2}$

None

$T_{1} > T_{2}$

answer is A.

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Detailed Solution

Slope $\tan θ = \frac{i}{v} = \frac{1}{R}$

For metals resistance (R) increases with increase in temp.

For the graph $T_{1}$ slope is more, hence R is less $∴ T_{1} < T_{2}$

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